I find this so tricky! Dp and I like such different names, and we’d both like them to work in both countries.
For reference dp loves the name Jakub with the nn Kuba, I am really, really not keen. I adore Henry, but the Polish equivalent Henryk is incredibly old fashioned according to dp. I like Eliasz, but again he hates it!
Girls names I LOVE Aurelia, dp not keen. It’s so hard to find a name that works in two languages that are incredible different.